Electrophotography – Control of electrophotography process – Of plural processes
Patent
1996-04-24
1998-01-13
Royer, William J.
Electrophotography
Control of electrophotography process
Of plural processes
399 50, 399 51, 399 53, G03G 1500
Patent
active
057089159
ABSTRACT:
An image-quality stabilizer in a copying machine feedback-controls a charger output according to an amount of toner on a photoreceptor drum detected by a patch sensor during a rotation of the photoreceptor drum after a copying operation. The image-quality stabilizer counts time that the copying machine is unused, i.e., time that the photoreceptor drum is stopped being rotated using a timer, and one-way controls the charger output according to the time immediately before the next copying operation. With these controlling operations, it is possible to correct a change in the copy density which is caused when the copying machine is used or left unused without increasing the consumption of toner and impairing the responsiveness of the copying machine, thereby achieving stable image quality.
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Inoue Katsushi
Masuda Jitsuo
Noguchi Teruhiko
Conlin David G.
Oliver Milton
Royer William J.
Sharp Kabushiki Kaisha
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